%0 Journal Article %A F. Aicardi %A V. A. Timorin %T On Binary Quadratic Forms with the Semigroup Property %J Informatics and Automation %D 2007 %P 28-48 %V 258 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2007_258_a3/ %G en %F TRSPY_2007_258_a3